Abstract: Polyacrylamide (PAAm) microgel particles were prepared using inverse emulsion polymerization and mixed into an acrylamide monomer solution to prepare a series of polyacrylamide cryogels containing microgel particles. By in situ loading of polypyrrole (PPy), PAAm@PPy cryogels were obtained. The microstructure of PAAm@PPy cryogels was characterized by scanning electron microscopy (SEM).The physicochemical properties of the PAAm@PPy cryogels were verified via Fourier-transform infrared spectroscopy(FT-IR), contact angle goniometer and ultraviolet-visible-near-infrared (UV-Vis-NIR) spectrophotometer. A photothermal water-evaporation setup was constructed to evaluate the photothermal water-evaporation rate and desalination performance of the cryogel-based evaporator. The results showed that the PAAm@PPy cryogel evaporators have a through multi-level pore structure, good hydrophilicity, and strong thermal stability. Since the incorporation of microgel particles inside those evaporators, under one sun illumination, the photothermal water evaporation rate of the cryogel-based evaporator reached 3.71 kg/(m²·h), and that for simulated seawater was above 2.70 kg/(m²·h). This study provides an effective approach for designing interfacial photothermal evaporators with high photothermal water evaporation rates.